New Automated MPD System Provides a Step Change in Performance with a Streamline Equipment Footprint

Abstract

Manual choke control has been the staple of many Managed Pressure Drilling (MPD) operations. To be successful manual choke control requires close communication and cooperation with between the driller and the choke operator. Responding to contingency scenarios, such as rig pump failure, is highly dependent upon the situational awareness of the choke operator and the speed at which they can respond. The consistency and repeatability of manual methods is therefore only as good as the choke operator's skill, experience and how well the choke operator and driller work together. Automated choke control increases the consistency and repeatability of control, as well as the ability to respond to contingency scenarios with little or no operator intervention. However, automation tends to increase the complexity of the equipment needed and changes the competencies required from personnel. Achieving a fit for purpose degree of automation that balances the delivery required to successfully drill the well without adding any more complexity than is absolutely necessary is therefore a challenge. This paper describes a new automated MPD system that was developed with the goal of providing increased performance while minimizing any additional complexity. The new system had to be capable of providing pressure trapping, to be able to manage multi-step pressure/flow pump ramp schedules, and yet had to have a similar physical footprint to and work with existing equipment. The technology was evaluated in terms of ability to control, setup time, ease of use, and ability to perform the scope of work required. The system represents a step change in performance compared to manual MPD and yet maintains a streamline equipment footprint.